Ring-expander.



Y No. 802,784. PATENTED OCT. 211V, 1905.

A. M.. REMINGTON.

' RING EXPANDBR. f

APPLIUATION FILED JULY 30,1904.

ffiici@ STATES PATENT FFIEE.

NOVELTY ENGINEERING ASSOCIATION,

SET TS.

OF FITOHBURG, MASSAOHU- RlNG-f-EXFANDEH.

Specification of Letters Patent.

Patented oct. 24, i905.

Application filed July SO, 1904. Serial No. 218,835.

Be it known that I, ALFRED M. REMINGTON, a citizen of the United States, and a resident of Fitchburg, in the county of l/Vorcester and State of Massachusetts, have invented a new and .Improved Ring-Expander, of which the following is a full, clear, and exact description.

My invention relates to a device for expanding linger-rings, and while it is capable of use for other purposes it is especially designed for this` purpose.

The principal object of my invention is to provide means for yexpanding finger rings which have stone settings without injuring the setting or disiiguring the ring in any manner.

it will be obvious that my invention may be used for expanding' all kinds of rings, and I do not wish to limit its use to the particular kind for which it is especially designed.

Referenceis to be had to theaccompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Referring to the drawings, Figure lis a perspective view of a portion of the preferred form of my invention. Fig. 2 is a longitudinal sectional view thereof, and Fig. 3 is aside elevation of the other part of the device which is used with the part of the instrument shown in the other figures.

In Fig. 3, (nre-presents a bench or other stationary object, to which is secured 'a bracket I), and which in turn supports a mandrel c. The mandrel may be clamped to the bracket by means of a thumb-screw ZJ'. The mandrel, as will be noticed, is preferably provided with a series of cylinders of different diameter, gradually varying from the smallest up to the largest and consisting of special like devices, which will receive rings of any size. A conical mandrel might be employed in cases where a slight conical shape on the inside of the ring is not objectionable. The ring is designed to be placed upon this mandrel at the point at which the latter is nearest Vto the size of the ring, as indicated in the figures. The rest of the instrument is then applied and the ring is expanded by a rolling motion, as will be brought out in detail. The mandrel is not necessarily mounted in a stationary position, but may be held in the hand while the rest of l the instrument is operated by the other hand, or both parts of the instrument may be mounted upon the same framework, one of them being so mounted as to be capable of movement relative to the other. The other part of the instrument (represented in Figs. 1 and 2) comprises a pair of elements in the form of levers a c. These are pivoted together at the point d', and a frame f is also pivoted to both of them at the same point or at any other de sired point. The framefis provided with a rear projection j, which may be adjusted to and from the lever e by 'means of a screw or equivalent device The frame f carries a roller g near its outer extremity. The lever CZ is provided with a pair of projw-tions d2, one upon each side of the frame f, each carrying one or more rollers t. These rollers may be made adjustable, if desired.

In the operation of the device the ring is placed upon the mandrel, as indicated in Fig. 3, and the rest of the instrument is applied thereto in suoli a manner that the rollers /t rest upon the surface of the mandrel, the rollers on one side preferably being placed lower than those on the other in the instrument, so that the instrument may conform to the general conical shape of the mandrel and leave the roller g in a position parallel to the axis of the mandrel. Nhen the instrument is placed in this manner, it is swung around until the roller g comes into Contact with the su rface of the ring. It is thus given an oscillating motion about the mandrel and ring and by pressing against the outer surface of the ring forces it first in one direction and then in the other and enlarges the passage through the ring in an obvious manner. The rollers g may be constructed of different configurations, according to the kind of ring operated upon, the plain roller, like that one shown, being designed for fiat-surfaced rings and rollers of other shapes, preferably having circumferential grooves, may be provided for operation upon rings of other shapes.

It will be observed that with the apparatus made upon the principle described the ring can be enlarged by operations upon that portion of the circui'nference which is opposite to the stone setting. Such an operation can be performed without any injury to the stone setting or to the ring and will enlarge the ring uniformly throughout.

By pressing the two handles of the levers (l and e together and running or turning this portion of the instrument around the mandrel IOO IOSl

and ring the roller g circles the ring underv pressure, causing the metal to iow, and thereby increasing the size oil the ring. The friction of the mandrel upon the ring being greater than the friction of the bearings of the roller itself, it is impossible for the ring to slip upon the mandrel, and the device can be conveniently operated from one side of the mandrel. By the adjustment of the plate f by means of the screw f2 a wide variation in rings can be operated upon with the same device without reducing the leverage or having' the handles oi' the lever open too wide to permit a good grip to be obtained.

It will be obvious that many modifications may be made in the embodiment illustrated in the drawings without departing from the spirit of my invention, and I do not wish to be limited to the construction illustrated.

Having thus described my invention, I claim as new and desire to secure by Letters Patentl. A ring-expander comprising' a pressing device adapted to be oscillated around a mandrel, said pressing' device comprising a pair of levers pivoted together and having rollers designed to operate upon the ring' and bear upon the mandrel, the roller of one lever being adjustable with respect to the main portion ot' that lever.

2. A ring-expander comprising a pressing device adapted to be oscillated upon the ring, said pressing device comprising a pair of levers pivoted together, one of said levers having a plurality of rollers and the other being' provided with one roller, the plurality of rollers being adapted to engage with a ringholding means and the single roller to engage with the ring and means for adjusting the single roller with respect to its lever.

3. A ring-expander comprising a pair of levers movably secured together, one lever having a plate movably attached thereto, and a roller on said plate, and the other lever having a pair of arms each being provided with rollers.

4:. A ring-expander comprising a pair of levers and a plate, said levers and plate being pivoted together at the same point, a screw mounted upon one of said levers for adjusting said plate upon its pivot in respect to the lever upon which the screw is mounted, said plate being provided with a roller and one of said levers being provided with a plurality of rollers located beyond the ends of the said iirst-mentioned roller.

5. A ring-expander, comprising a pair of levers movably connected together, one lever having a plate pivoted thereto, means for adjusting' said plate about its pivot, a roller on said plate, and a roller on the other lever.

6. A ring-expander, comprising a pair of levers movably connected together, one lever having' a plate movably and adjustably attached thereto, a roller on said plate, and a roller on the other lever.

7. A ring-expander, comprising a pair or' levers, a plate, said levers and plate being pivoted together, means mounted upon one of the levers for adjusting the plate upon its pivot with respect to that level', a roller on said plate, and a plurality ot' rollers on the other lever` the said last-mentioned rollers being located beyond the ends of the firstmentioned roller.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing witnesses.

ALFRED M. REMINGTON.

Witnesses:

JOHN F. MGGRATH, M. ALICE CRoTTY. 

